Some examples of "No Line-of-Sight", I.E. trees, etc.
blocking the view to the satellite

Harbor
Beach, MI, May '04 Service Call - Some installer installed this dish with
2 of the LNBs not getting any signal because of the pine tree. I re-installed
the dish at the back of the house where there were no LOS problems. See
04/05/10

Mt.
Morris , MI, Apr '04 - Facing SSW - as you can see, there is a huge tree.
There was no place to put the Phase III dish and get a good signal from
any of the satellites.

"But
my neighbor has a dish". True, the neighbor has a Dish Network dish
and I'd be willing to bet when the leaves come out, he's going to lose a
lot of signal.